Fire, police & medical coverage issues

When I place the stations, there is adequate coverage (everything green). Then I get alerts that I don’t have fire, police or medical coverage. The service numbers keep changing and areas go red again.  I keep having to move my fire, police and medical stations out and back in to their spots. My satisfaction rating is affected and people move out because it has happened 20-30 times. Im logging in constantly and fixing it. The game is becoming less fun because of this bug. I’m about ready to quit because of it. Please fix!!!